Empty scene with a hidden envirosphere (Without the elaborate shader setup) for faster raytrace and to have something to reflect.

Ground set to shadow catch only.

Two render lights: 1 white IBL for fill, one infinite Sun for shadows and specularity. If I need IDL, I just disable the IBL.

Eight additional preview lights (which don't render) as I want my OpenGL preview to look as realistic as possible. After all it's what I'm looking at most of the time.

No hardware shadows as they stopped working on my machine with SR1. They made OpenGL slow as molasses anyway and looked very ugly, so no big deal.

Default render settings that make a "good enough to post in the forum" render in a few seconds, but I have several other presets saved, too.